A valuation ratio calculated by dividing a company's current share price by its earnings per share, indicating how much investors are willing to pay for each dollar of earnings. A higher P/E suggests higher growth expectations.
Popularized in the 1930s by Benjamin Graham and David Dodd in 'Security Analysis,' building on earlier work by financial analysts seeking simple valuation metrics. The ratio became the gold standard for quick stock comparisons as markets became more sophisticated.
The P/E ratio is like a financial crystal ball that reveals what investors really think about a company's future! A P/E of 30 means investors are so confident in growth that they'll pay $30 today for every $1 of current earnings - but when growth disappoints, that optimism can evaporate faster than morning dew.
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